Glucose is absorbed by Na+/glucose symporter into the intestinal epithelial cells.
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Symporter is located on the apical membrane of the intestinal epithelial cell and it <span>is used for uptake of glucose from the intestinal lumen into the cell (against the concentration gradient). One glucose molecule and two Na+ enter the cell via symporter. Na+ concentration gradient and the membrane potential (generated from the Na+/K+ ATPase in the basolateral membrane) enable the function of the symporter. Glucose leaves the cell via facilitated diffusion on the basolateral membrane of the intestinal epithelial cell and goes into the blood.</span></span>
Answer:
Ongoing effects include rising sea levels due to thermal expansion and melting of glaciers and ice sheets, and warming of the ocean surface, leading to increased temperature stratification.
<span>During JURASSIC period the first true mammals appear.</span>
Answer: Homeostasis
Explanation: One way that a cell maintains homeostasis is by controlling the movement of substances across the cell membrane. The lipid bilayer is selectively permeable to small, nonpolar substances. Proteins in the cell membrane include cell-surface markers, receptor proteins, enzymes, and transport proteins.
I think b. Proteins are polymers of amino acids is the correct answer
